Definitions by BMoreDictionary

Swim for the whistle 

Intentionally engaging in act until you are told or made to stop.
Originated when a group of friends would go to the beach and swim out into the ocean until the lifeguards would blow the whistle to make them come back.

When drinking at a bar it may not be a good idea to swim for the whistle.

Swim for the whistle by BMoreDictionary September 24, 2022